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Hello everyone, i have stumbled on a wierd problem concerning my laptop's battery..
Laptop model: HP Pavillion DM4-1273CA
Discrete GPU: ATI Radeon 6370M
CPU: Intel Core i5 @ 2.43ghz with integrated gpu.
- first and foremost, my laptop comes with 2 graphics cards, an integrated and discrete
lspci | grep VGA:
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
01:00.0 VGA compatible controller: ATI Technologies Inc Robson CE [AMD Radeon HD 6300 Series] (rev ff)
- It uses the Intel driver to start with X, and it runs very, very smooth.
glxinfo | grep renderer:
OpenGL renderer string: Mesa DRI Intel(R) Ironlake Mobile
- So basically i want to disable the discrete gpu (ati card) for saving some power, keeping cool temps, and the Intel card provides more than enough power.
So far i used the built-in KMS: "vgaswitcheroo", and all went well.
cat /etc/rc.local:
echo INT > /sys/kernel/debug/vgaswitcheroo/switch
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
- those are the commands i used, the output of /sys/kernel/debug/vgaswitcheroo/switch is:
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :Off:0000:01:00.0
- So it says that it's switched off. I can tell from the laptop feeling cooler than before and from the fan not
raging every 2 seconds.... BUT!
acpi -b:
Battery 0: Discharging, 100%, 01:27:25 remaining
- I became sceptical when i read this because on Windows 7 it gives me the same reading, and also when
vgaswitcheroo wasn't active.. The battery power is the same when unplugged! I was told that the battery
power would go up by at least one hour..
Any help concerning this problem would be grateful, Thank you.
Last edited by binaryphr3k (2011-10-28 16:48:15)
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